Tridax procumbens

Description: Tridax procumbens, commonly known as coatbuttons or tridax daisy, is a species of flowering plant in the family Asteraceae. It is best known as a widespread weed and pest plant. It is native to the tropical Americas including Mexico, but it has been introduced to tropical, subtropical, and mild temperate regions worldwide. It is listed as a noxious weed in the United States and has pest status in nine states.

Flowering and Fruiting: All the year round. 

Economic Importance: Traditionally, Tridax procumbens has been in use in India for wound healing and as an anticoagulant, antifungal, and insect repellent. Tridax procumbens is also used as treatment for boils, blisters, and cuts by local healers in parts of India.

Reference: https://en.wikipedia.org/wiki/Tridax_procumbens